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Czochralski Growth of {\rm Ce}^{3+} -Doped {\rm Li}_{6}{\rm Gd}({\rm BO}_{3})_{3} Single Crystals

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5 Author(s)
Shangke Pan ; Shanghai Inst. of Ceramics, Chinese Acad. of Sci., Shanghai, China ; Fan Yang ; Dongzhou Ding ; Sheng Lu
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The Ce3+ doped Li6Gd(BO3)3 (LGBO) crystal is a promising scintillation crystal for thermal neutron detection. This crystal can be grown by Czochralski technique or modified Bridgman method for its melting point at about 848°C. With a lower radial temperature gradient, the LGBO crystal using CeO2 as dopant host (CeO2:LGBO) can only be grown with the diameter less than 15 mm with a smaller shouldering angle. The viscosity of the melt will be decreased and the crystal diameter can be effectively enlarged by using CeF3 as dopant host (CeF3:LGBO) when the crystals are grown with the same growth parameters. By increasing the radial temperature gradient, larger diameter single crystals of CeO2:LGBO with the diameter of 30 mm or 40 mm have been grown with a larger shouldering angle. The excitation and emission peaks will red shift and the X-ray excited luminescence emission intensity will be increased by using CeF3 instead of CeO2 as dopant host.

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Nuclear Science, IEEE Transactions on  (Volume:57 ,  Issue: 3 )